- Well, this is your opportunity. He won't be here today.
- Are you sure?
- Positive! I helped Mrs. Teasdale with the invitations.
- Oh.

11 seconds sound clip from the Duck Soup (1933) movie soundboard.

You can hear this line at 00:29:52.900 in the Blu-ray version of the movie.

Quote context

[...]

- Where'd you hear that story?

- You told it to me.

- Oh, yes! I remember. I should've slapped Mrs. Teasdale's face when she told it to me.

- Where is Trentino?

- At Mrs. Teasdale's tea party.

- Was I invited?

- No.

- Take a letter! You are cordially invited to attend my tea party. Sign Mrs. Teasdale's name and tell her I accept. Come on, let's go.

- I've got an appointment to insult Ambassador Trentino, and I don't want to keep him waiting! Step on it!

- This is the fifth trip I've made today and I haven't been anywhere yet.

- You don't seem to be making much progress with Mrs. Teasdale, huh?

- How can I? Every time I get her in the right mood to say yes, Firefly pops in.

- Well, this is your opportunity. He won't be here today.

- Are you sure?

- Positive! I helped Mrs. Teasdale with the invitations.

- Oh.

- His Excellency, Rufus T. Firefly!

- Hail, hail Freedonia, land of the brave and free. (3)

- Gloria, I waited for years. I can't be put off any longer. I love you, I want you! Can't you see I'm at your feet?

- When you get through with her feet, you can start on mine.

[...]